Ezekiel



(No Model.)

HEATING PURNAGB.

No. 369,774. Patented Slept '18', 1887.

T m m C" 3] l] 11 im \ili` M trier.,

PATENT EZEKIEL C. CONDIT, OF KANSAS CITY, MISSOURI.

HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 369,774, datedSeptember 13, 1887.

(No model.)

T0 all whom, it muy concern:

Be it known that l, EZEKIEL C. CONDIT, of Kansas City, in the county ofJackson and State of Missouri, have invented certain new and usefulImprovements in Furnaces,of which the following is a specilication.

rllhis invention relates to hot-air furnaces; and the invention consistsin certain improvements whereby provision is made for the eX- pansion ofthe parts Without injury, and whereby, also, the heating capacity of thefurnace can be altered at will to adapt it to the variations in theweather, as hereinafter more fully explained.

Figure l is a perspective view, partly in section. Fig. 2is afrontelevation with the faceplate removed; and Fig. 3is a transverse verticalsection on the line m x of Fig. 1, enlarged to more clearly show theexpansion-joint, and Fig. 4, a view of a detail.

My invention relates more especially to that class of furnaces designedfor heating large buildings, such as publicschool buildings, churches,and the like, and may be considered as an improvement on the furnacedescribed in my application filed August 2l, 1886, though one feature ofthe invention is applicable generally to all furnaces of the kind knownas the Buttan heaters.

rlhe general construction of the furnace in this case is the same asthat described in my application before mentioned, the same general formof body and tubes 'being used, and differing therefrom only in theparticulars hereinafter described.

In constructing` a furnace according to my present improvement l use acast-iron body or fire-box, A, with vertical air-tubes C, the same as inmy former case; but instead of dividing the body A by a longitudinaljoint about midway of its height, as before, I extend the side walls ofthe body A down to the bottom plate, B, as shown in Figs. 1 and 2, andconnect the parts A and B by a peculiarly-constructed joint tocompensate for' the unequal expansion of the various parts. Thisexpansion-joint,

A to fit against, and at its outer edge with a` depending flange or lugsto afford a bearing for and means of securing a plate, D, as shown. Thisplate D, I make in the form of a narrow strip of the proper length tocorrespond'with the other parts, and along its inner face form alaterally-proj ectingflan ge or rib, e. as shown, the width of the plateD and the location of the rib e being such that when the plate D isbolted fast to the bottom plate, B, ai shown in the several figures,there will be a considerable space left between the flange c and theupper face of the bottom plate, B. On the exterior face of the plates ofthe body A, along its lower edge, I form a laterally-projecting liangeor rib, a, as shown in Fig. 3, so that when the parts are put together,as shown, the lower edge of the body A, with its fiange or rib c, willbe inclosed in the aforesaid space,whereby the lower edge of the body Ais held securely in place between the flange b and the plate D, and yetis permitted to rise or fall between them as it may be moved by theexpansion or contraction ofthe tubes C, which, being located within thefire chamber and bearing at their ends against the top of the body A andthe bottom plate, B, will necessarily cause a considerable movement ofthose parts in relation to each other. By this construction l am enabledto form an expansion-joint which securely unites the parts, prevents thesides from being thrown out of position by warping, Sto., and stillpermits sufficient movement ofthe body Ain relation to the bottom B tocompensate for any expansion of the tubes or other parts, and alsoprevents any unequal strain that might occur by the unequal heating andconsequent unequal expansion of the parts in case the body A and bottomB were rigidly connected by bolts or otherwise.

If it be desired to make the joint air-tight,

it may be done by inserting a strip of ashes IOO permitting this to bedone without disturbing the bottom B and without removing the plates D,it being understood that these furnaces are usually made of such a sizeand with their 5 front door large enough to enable a workman plan shown,it is obvious that it may be applied to other forms of furnaces orheat-generating apparatus, and that it may be applied to any part of thcfurnace or apparatus with lik-e results, and therefore I do not desireto be understood as limiting its application or use to this particularfurnace or to the special part of the furnace here shown, as I proposeto apply it whereever and whenever it can be with advantage. 4

In order to adapt the furnace to the varying conditions of the weather,I provide a valve, V, which, as shown in Figs. 1 and 2, I locate at thecenter of the front chamber, N, which connects the front ends of thehorizontal heat-tubes H with the smoke-pipe I. As shown in Fig. 2, theseheat-tubes H are usually ten in number, (though there may be more orless,) half being arranged at one side and the other half at theopposite side, as shown.

The valve V, as shown in Fig. 2, is hinged or pivoted at its lower edgeand arranged to be swung to one or the other side of thesmokepipe I, asindicated by the dotted lines in Fig. 2, it being of a width equal tothat of the chamber N, as shown in Fig. l, so that when moved to oneside it will cut off the passage of heat and smoke through the tubes Hon that side, and consequently will reduce the heating capacity of thefurnace, because, as -there will lthen be no communication between theheat-tubes H on that side and the smokepipe I, there can of course be nodraft through them, and consequently no passage of smoke and heat. ThevalveV can be thrown to either side, thus shutting off the smoke andheat 5 5 from either side at will.

,When it is desired to utilize the furnace to -its full heatingcapacity, the valve V will be set in a vertical position, as indicatedby the full lines in Fig. 2, in which case it will stand 6o directlyopposite the center of the smoke-pipe ber N is curved to correspond withthe arc of 6 5 the circle in which the free'end of the valve swings, soas to effectually close the space, or it may be made straight at thatpart and have av flange project downward within the chamber at the pointon each side where the valve is to stop, the valve in that case restingagainst said ange, which,together with the valve,will close the spacejust the same.

In order to adjust the valve and secure it in position, it has attachedto or formed with it a stem, Z, which projects through a curved slot, u,in the front wall of the chamber N, as`

shown in Fig. 1, this stem Z having a screwthread on it, to which isapplied a thumb-nut, 0, as shown, by which the valve can be fastened inany position desired. A small plate will be placed on the stem Z beforeapplying the nut o, so as to cover the slot n; or, what would be thesame in effect, the valve' V may have small flanges cast on or securedto it of 8 5 the proper size to cover the slot on the inside, as shownin Fig. 4. By means of this valveI am enabled to adapt the furnace tothe varying conditions of the weather and requirements of the building.Whenever the weather is severe, the valve will be adjusted at thecenter, when ythe furnace can be run to its full capacity, therebyproducing a degree of heat which would be intolerable in mild weather,

may be applied to them all, whether they be,

made with or without the vertical air-tubes C. The grate is notdescribed, as it will form the subject of a separate application. y

Having thus fully described my invention, what I claim is- .1." Anexpansion -joint for furnaces, constructed substantially as described,and which consists of a metallic plate, A, provided with a rib, a, theplate D, provided with the .iiange or rib e, and the plate B, providedwith the iiange b, said parts being arranged to operate substantially asshown and described.

2. The combination, in a furnace, of the smoke-chamber N, sets ofsmoke-tlues H, entering the same at opposite sides, and an out` let orsmoke pipe, I, leading therefrom, with a valve or damper, V, arranged toshut off the communication between one or the other set of flues H andthe outlet orsmoke pipe I, substantially as and for the purpose setforth.

EZEKIEL C. CON DIT.

Witnesses:

M. A. CoNDrr, I. l?. DANA.-

IOO

IIS

